CVE-2026-63771 — Adminer < 5.4.3 Cookie Injection via X-Forwarded-Prefix Header
Adminer before 5.4.3 contains a cookie injection vulnerability that allows attackers to manipulate cookie attributes by injecting arbitrary values through the unsanitized X-Forw…
Published: 2026-07-20 · CVSS: 6.0 · CVSS 4.0
Adminer before 5.4.3 contains a cookie injection vulnerability that allows attackers to manipulate cookie attributes by injecting arbitrary values through the unsanitized X-Forwarded-Prefix HTTP header used in Set-Cookie path attributes. Attackers can exploit a misconfigured reverse proxy to downgrade SameSite protection and enable cross-origin authenticated requests, bypassing cookie security controls.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7